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Finding the Third Proportional to 18,660 and 40,480

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Solution

The third proportional to 18,660 and 40,480 is: 87,815.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660 : 40,480 = 40,480 : x
  2. Step 2: Convert to fraction form
    18,660/40,480 = 40,480/x
  3. Step 3: Cross multiply
    18,660x = 40,480 × 40,480
  4. Step 4: Simplify right side
    18,660x = 1,638,630,400
  5. Step 5: Solve for x
    x = 1,638,630,400/18,660
  6. Step 6: Final answer
    x = 87,815.13

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.